The U.S. Geological Survey reports that a 4.6 magnitude earthquake has rattled the Three Lakes area of Washington state.
That was followed minutes later by a 3.5 magnitude aftershock near the city of Monroe, some 48 kilometres northeast of Seattle.
The initial temblor was recorded at 2:51 a.m. Friday.
There were no immediate reports of damage or injuries.
Some Island and even Lower Mainland residents may have been woken by the quake.
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It was lightly felt in Greater Victoria and Vancouver areas, according to Natural Resources Canada.
No tsunami warning or advisories are in effect. No serious injuries or damage have been reported.
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